Disposable liner



Jan. 4, 1966 B. E. ENSSLE DISPOSABLE LINER Filed Aug. 9, 1963 IL I7 FIG. 2

II- III I8 22 2O I |!m: i 2| I3 23 1 IO m FIG. 4

BRUNO E. ENSSLE INVENTOR.

BY f n! [1. FIG. 3 t

United States Patent 3,227,305 DTSEOSABILE LINER Bruno Eugen Enssle, Boulder, (1010., assignor to Births Manufacturing Company, Chicago, Ell. Filed Aug. 9, 1963, Ser. No. 301,021 1 Claim. (Ci. 220-63) This invention provides a disposable liner for a container, and has been developed in conjunction with paintspraying equipment to eliminate the laborious process of cleaning the paint containers of the spray guns when work with a particular paint has been completed. Changing colors is thus simplified, and the period of non-use of the equipment is considerably shortened.

Disposable liners are not broadly new, and have been used for purposes similar to those outlined above. The present invention provides an improved liner construction adapted particularly well to a standard form of container in wide use in industry. The liner insert is equipped with preferably discontinuous reinforcing strips that are applied to the exterior of the top of the paint container, with the remainder of the liner envelope extending over the rim and into the interior. The installation of the liner involves a half-turn of a rolling procedure similar to rolling a shirt sleeve. The reinforcing strips are adapted for positioning between the conventional top-anchoring lugs of the container and the top itself. The discontinuity of the reinforcing strips facilitates the manufacture and storage of the liner in flat, as these points of discontinuity correspond to the opposite ends of a diameter at the top of the liner. These points of discontinuity also provide portions extending somewhat radially outward from the container when installed, as a result of the slight resistance of the reinforcing strips to bending, and facilitate gripping the liners for removal.

The leaf-spring resilience of these reinforcing strips tends to grip the top of the container lightly to hold the position of the liner when the cover is not attached.

The several features of the invention will be analyzed in detail through a discussion of the particular embodiment illustrated in the accompayning drawing. In the drawing:

FIGURE 1 presents a perspective view of a standard paint container, with the liner installed, and prior to the application of the top of the container.

FIGURE 2 is a plan view showing the liner envelope itself.

FIGURE 3 is a sectional elevation on an enlarged scale, and showing the installed relationship of the container, the liner, and the container top.

FIGURE 4 is a fragmentary sectional elevation showing the relationship of the top portion of the liner as it is rolled over the top of the container prior to the application of the cover.

Referring to the drawing, the container indicated generally at is of standard construction, and is equipped with the radially-extending anchoring lugs 11 and 12 which provide points at which the cover may be secured in position. The liner envelope 13 is shown in FIGURES 1 and 4 inserted in the container, with the opening portion 14 rolled over the rim 15 of the container in the manner best shown in FIGURE 4. i A pair of reinforcing strips 16 and 17, preferably of the same length, are applied to the top opening 14 on the outside of the envelope when the envelope is in the fiat condition shown in FIGURE 2. These are preferably adhesively secured, for simplicity. The material of the strips is preferably light cardboard; and in spite of porviding a high degree of flexibility, there is a sufficient resistance of these strips to bending to provide portions tending to stretch the liner material radially outward as shown in FIGURE 4 at the points of discontinuity between the strips 16 and 17. These points produce portions of the liner which are readily accessible to the fingers, and facilitate the removal of the liner from the container.

After the insertion of the liner has been completed as shown in FIGURE -4, the top assembly 18 is installed. This assembly includes a cover plate 19 which closes over the opening defined by the rim 15 of the container, and also includes a bail 29 having hooked ends which engage the lugs 11 and 12. A tightening nut 21 engages a threaded portion (not shown) of the column 22; and after the bail 20 has been engaged with the lugs 11 and 12, rotation of the nut 21 can be applied which will force the cover plate 19 down to form a seal between the rim 15 and the gasket 23. In this condition of the assembled unit, the strips 16 and 17 are adapted to be positioned with convenient clearance between the lugs 11 and 12 and the top plate 19, as shown best in FIGURE 3. The structure of the top assembly 13 is standard, and forms no part of the present invention.

The particular embodiments of the present invention which have been illustrated and discussed herein are for illustrative purposes only and are not to be considered as a limitation upon the scope of the appended claim. In this claim, it is my intent to claim the entire invention disclosed herein, except as I am limited by the prior art.

I claim: In combination with a container having a top opening and a cover and radially-extending lugs on the opposite sides of said container below the top thereof for securing said cover, a gasket between said container and cover, a liner comprising:

an envelope adapted for insertion in said container, having an opening portion for registry with the top opening of said container extending between said cover and opening and having an edge disposed externally of said container above said lugs;

discontinuous reinforcement strip means having a width less than the distance between said cover and lugs secured to said opening portion and received with the adjacent part of said opening portion on the exterior of said container between said lugs and the underside of said cover, said envelope then extending from said strip means over the edge of the top of said container and into the interior thereof.

References Cited by the Examiner UNITED STATES PATENTS 1,608,901 11/1926 Miller 220- 2,159,192 5/1939 Werdin 22065 2,788,926 4/ 1957 Morrison 22065 THERON E. CONDON, Primary Examiner. 

